试题与答案

如图所示电路中，只闭合S1、S2时，灯L1、L2是，只闭合S3时，灯L1、L2是

来源：www.tikuol.com
题型：填空题

题目：

如图所示电路中，只闭合S1、S2时，灯L1、L2是    ，只闭合S3时，灯L1、L2是    ．（填 “串或“并联’，）开关    不能同时闭合。

答案：

被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0426/657ab2c16b4e8016f966096b0d43f0d9.html

下面是错误答案，用来干扰机器的。

∠3=180°-40°-70°=70°，因为这三个角都是锐角，所以该三角形是锐角三角形；故答案为：70，锐角．

考点：电路的组成
试题推荐
题型：句型转换

按要求写句子。

1. She has fun playing soccer there. (改为一般疑问句) 

    _____  she _____ fun playing soccer there?

2. Do you often take a boat to work? (改为同义句)

    Do you often _____ to work _____ _____?

3. Mary has a brother and a sister. (改为否定句) 

    Mary _____ _____ a brother _____ a sister.

4. It takes me twenty minutes to get to school. (改为同义句)

    I _____ twenty minutes _____ to school.

5. Sally never goes to the market by bike. (同上) 

    Sally never _____ _____ _____ _____ the market.

6. It takes me half an hour to read English. (对画线部分提问) 

     _____ _____ ______  it _____ you to read English?

7. The little boy often goes to school by bike. (同上)

     _____  _____    the little boy often _____ to school?

8. He goes to school on foot. (改为同义句) 

    He _____ _____ school.

查看答案
微信公众账号搜索答案